TWI732811B - Electronic pen, electronic pen body, and manufacturing method of electronic pen body - Google Patents

Abstract

Provide an electronic pen with high dust and water resistance.

The electronic pen contains at least a structural member for realizing the function of an electronic pen including a core body and a circuit board on which at least a part of the structural member is arranged in the hollow part of the cylindrical outer frame. In the hollow part of the cylindrical inner frame body housed in the hollow part of the outer frame body, the structural members and the circuit board are housed, and the front end of the core body is from the axial center of the inner frame body. With the first opening on one side protruding to the outside, the core system is housed in the inner frame. Fill the hollow part of the inner frame with resin.

Description

Electronic pen, electronic pen body, and manufacturing method of electronic pen body

The present invention relates to an electronic pen used with a position detection device, and particularly relates to an electronic pen constructed as a waterproof type. In addition, the present invention relates to an electronic pen main body housed in an electronic pen and a method for manufacturing the electronic pen main body.

In recent years, the increasing popularity of portable terminals is due to the convenience of being able to be carried, so there are more opportunities for outdoor use. As a special example, it may be used in a dusty environment such as a construction site or in a harsher environment near the water's edge. In addition, in indoor use, it may accidentally fall into the water on the sink or kitchen. Therefore, the requirements for dustproof and waterproof of portable terminals are increasing, and portable terminals have become specifications that can withstand the above-mentioned general harsh environment.

In addition, recently, it is used as an input device for the above-mentioned general portable terminal, and is used for a device composed of an electronic pen and a position detection device equipped with a position detection sensor. In this case, since the position detection sensor is built into the portable terminal, it is dustproof or waterproof. There is no problem with the system. However, since the electronic pen is an individual independent of the portable terminal, it is necessary to be dust-proof or waterproof.

That is, in the electronic pen, small electronic parts are used, and the resistance to moisture is weak. In addition, there are electronic pens that use a coil wound on a magnetic core like an electromagnetic induction method. However, due to the influence of moisture, the constant of the coil changes and becomes a malfunction. reason.

Therefore, the applicant in this case has proposed Patent Document 1 (Japanese Patent Laid-Open No. 2010-198193) for the protection of electronic pens, and proposed Patent Document 2 (WO2015/122280A1 Publications) on the waterproofing of electronic pens. ). In Patent Document 1, a rubber cap is installed between the core body and the frame body to achieve dust protection. Also, in Patent Document 2, the gap between the opening at the pen point side of the frame and the core is closed by a rubber gasket, and an O-ring is used to close the frame The gap between the part holding part and the frame on the side opposite to the pen point side is closed, so as to achieve dustproof and waterproof.

[Prior Technical Literature] [Patent Literature]

[Patent Document 1] JP 2010-198193 A

[Patent Document 2] WO2015/122280A1 Publication

However, in the case of using rubber gaskets, it is necessary to have the accuracy of the gasket as a part, and there are also problems of performance changes due to the degree of locking of the gasket. In addition, when the pressure applied to the core is detected by the displacement of the core toward the axis, the washer will become a load on the displaced part (core) and it will not be able to detect correctly The worries of pen pressure. In addition, rubber gaskets will deteriorate if they are used for a long time, and they also have the problem of attenuating the effect of preventing dust or moisture.

The present invention aims to solve the above-mentioned problems and provide an electronic pen with high dust and water resistance.

In order to solve the above-mentioned problems, the invention of claim 1 provides an electronic pen, which is contained in a hollow portion of a cylindrical outer frame, and at least includes: a structural member for realizing the function of an electronic pen including a core, and The electronic pen is equipped with a circuit board provided with at least a part of the aforementioned constituent members, and the electronic pen is characterized in that the aforementioned configuration is accommodated in the hollow portion of the cylindrical inner frame body housed in the aforementioned hollow portion of the outer frame body The member and the circuit board, and in a state where the front end of the core body protrudes to the outside from the first opening on one side of the axial direction of the inner frame, the core system is housed in the inside In the frame, the hollow portion of the inner frame is filled with resin.

If it is based on the issue of claim 1 with the above-mentioned constitution It is clear that the part of the core body other than a part of the front end, the structural member for realizing the function of the electronic pen, and the circuit board on which at least a part of the structural member is arranged are housed in the hollow of the inner frame. In the state where these are accommodated, the hollow portion of the inner frame is filled with resin. That is, all the parts contained in the inner frame are sealed with resin, and the dustproof and waterproof measures for the electronic parts are fully implemented.

Therefore, it is possible to realize an electronic pen that has high dust and water resistance and can also be used in water. In addition, since the system does not use rubber gaskets or O-rings as in the prior art, the system has the effect that the general problems described at the beginning will not occur at all.

In addition, the invention of claim 2 provides an electronic pen in the invention of claim 1, and has the following characteristics: that is, the aforementioned constituent member includes a core for detecting that it is applied to the aforementioned core body. The pressure detecting part for the pressure at the front end, the pressure detecting part is arranged in the second opening on the other side of the axial direction of the inner frame opposite to the front end of the core In addition, the pressure detection unit detects that the entire inner frame body faces the front end of the core body in response to the pressure applied to the front end of the core body. The electrical quantity changed by the displacement on the opposite side of the part side is used to detect the aforementioned pressure.

According to the invention of claim 2, the pressure detection unit is arranged in the front of the inner frame on the opposite side to the front end of the core. In the vicinity of the second opening on the other side of the axis direction, the pressure of the pen is detected by detecting the electrical quantity that changes based on the displacement of the entire inner frame. Therefore, there is no case where a load is applied to the displacement part that is displaced for pressure (pen pressure) detection like the rubber gasket of the prior art, and the pressure (pen pressure) can be accurately detected.

According to the present invention, the part of the core body other than a part of the tip portion, the constituent member for realizing the function of the electronic pen, and the circuit board on which at least a part of the constituent member is arranged are housed inside In the hollow part of the frame, and in the state of being accommodated, the hollow part of the inner frame is filled with resin, and all the parts accommodated in the inner frame are sealed with resin Therefore, the dustproof and waterproof measures for electronic parts are fully implemented.

In addition, according to the present invention, it is possible to achieve the effect of not requiring the use of special parts for dustproof or waterproof as in the prior art.

1‧‧‧Coil section

2‧‧‧Core tip component

2C‧‧‧Core

3‧‧‧Connecting member

4‧‧‧Circuit board

5‧‧‧Pen pressure detection part

6‧‧‧Substrate protection tube

7‧‧‧Filled resin

10‧‧‧Electronic pen

11‧‧‧Ferrite core

12‧‧‧Coil

20‧‧‧Electronic pen body

101‧‧‧External frame

102‧‧‧Frame cover

201‧‧‧Electronic pen body part frame (internal frame)

210‧‧‧Mold components for mold sealing

[Fig. 1] is a diagram for explaining a configuration example of the first embodiment of the electronic pen according to the present invention.

[Fig. 2] is an exploded three-dimensional view for explaining an example of the structure of the electronic pen main body constituting the first embodiment of the electronic pen according to the present invention picture.

Fig. 3 is a diagram for explaining an example of the configuration of important parts of the electronic pen main body constituting the first embodiment of the electronic pen according to the present invention.

Fig. 4 is a diagram showing an example of the electronic circuit configuration of the first embodiment of the electronic pen according to the present invention and a circuit configuration example of the position detection device.

Fig. 5 is a diagram for explaining a configuration example of the second embodiment of the electronic pen according to the present invention.

[Fig. 6] is a diagram for explaining the important part of the configuration example of the third embodiment of the electronic pen according to the present invention.

Fig. 7 is a diagram showing an example of the electronic circuit configuration of the third embodiment of the electronic pen according to the present invention.

Fig. 8 is a diagram showing an example of the circuit configuration of a position detecting device used with the third embodiment of the electronic pen according to the present invention.

[Fig. 9] is a diagram for explaining the manufacturing method of the electronic pen body of another embodiment of the electronic pen according to the present invention.

[Fig. 10] is a diagram for explaining the important part of the electronic pen body of another embodiment of the electronic pen according to the present invention.

Fig. 11 is a diagram for explaining an example of the electronic circuit configuration of the main body of the electronic pen when the example shown in Fig. 10 is used.

Hereinafter, with reference to the drawings, the embodiment of the electronic pen according to the present invention will be described. First, the description will be given of the embodiment when the present invention is applied to an electronic pen of an electromagnetic induction method.

[Constitution of electronic pen]

FIG. 1 is a diagram for explaining a configuration example of the electronic pen 10 of the embodiment of the present invention, and is for explaining the overall outline of the electronic pen 10 of this embodiment. In the electronic pen 10 of this embodiment, the electronic pen body 20 is housed in the hollow portion of the cylindrical outer frame 101 of the electronic pen 10, and the rear end side of the outer frame 101 opposite to the pen point side is borrowed The frame body cover 102 is closed to form it.

In this embodiment, the electronic pen main body 20 is located in the hollow portion of the cylindrical electronic pen main body frame (inner frame) 201, and is configured to include electronic pens other than the front end of the core as described later. All the various parts of the pen shall be contained. In FIG. 1, the cylindrical outer frame (housing) 101 of the electronic pen 10 of this embodiment and the cylindrical electronic pen main body frame 201 of the electronic pen main body 20 are cut off, and each Exhibited in the hollow department.

The electronic pen main body 20 is as shown in FIG. 1. In the hollow part of the electronic pen main body frame 201, the coil part 1, the connecting member 3, the circuit board 4, and the pen pressure as the pressure detecting part are accommodated. The detecting part 5 is formed by filling the hollow part with resin as described later. Among them, the coil part 1, in this example, is a magnetic core that uses a core body as a dual purpose. For example, the ferrite core 11 is wound with The coil 12 is constituted by. Here, the coil unit 1 and the pen pressure detecting unit 5, etc., constitute part of the component parts for realizing the function of the electronic pen.

The ferrite core 11 that uses the core as a dual purpose, in this example, is configured as a solid rod-shaped body with a circular cross-section and no through hole in the axial direction. The coil 12 is wound Wound on the opposite side of the core from the part that becomes the front end. In addition, a cone-shaped core tip member 2 made of resin such as POM (Polyoxymethylene) is attached to the end surface of the portion of the ferrite core 11 that becomes the front end side of the core. In the case of this example, the center of the end surface of the ferrite core 11 that becomes the front end side of the core is provided with a recessed hole 11a, and at the bottom surface of the conical shape of the core front end member 2, It is provided with a protrusion 2a fitted in the recessed hole 11a. By pressing the protrusion 2a of the core front end member 2 into the recessed hole 11a of the ferrite core 11, the core front end member 2 is fixed At the ferrite core 11. In addition, in order to prevent the core front end member 2 from detaching from the ferrite core 11, the two may be further joined by an adhesive material.

In this embodiment, the coil portion 1 is such that the portion of the ferrite core 11 where the coil 12 is not wound and the core tip member 2 can be removed from the main body of the electronic pen as shown in FIG. The opening 201a of the housing 201 and the opening 101a of the outer housing 101 are housed in the electronic pen body housing 201 in such a way that they protrude to the outside. However, in this case, the coil unit 1 is configured such that at least the portion where the coil 12 is wound and the connecting portion between the coil 12 and the circuit board are located in the hollow portion of the electronic pen main body housing 201.

The circuit board 4 is fixed and held in a substrate protection tube 6 formed of a rigid tubular member. The connecting member 3 is used to lock the coil unit 1 to the substrate protection tube 6. The pen pressure detecting section 5, in this embodiment, is provided with a connecting terminal section 51 with the circuit board 4, a fitting section 52 with the substrate protection tube 6, and a pressure-sensitive section 53, and are The fitting portion 52 is fitted to and joined to the substrate protection tube 6.

FIG. 2 is an exploded perspective view for explaining the structure of the main body portion 20 of the electronic pen. The coil 12 is formed by winding an insulated wire (coated wire) around the ferrite core 11. On the side opposite to the core end member 2 side, one end of the coil 12 is led out (Winding start end) extension cord 12a and the other end of the coil (winding end end) extension cord 12b.

The facing surface between the connecting member 3 and the ferrite core 11 is formed with a fitting recess 31 that is slightly larger than the diameter of the ferrite core 11, and is configured to make the ferrite core 11 is inserted into this fitting recessed hole 31 to combine the two. In addition, the connecting member 3 is formed with grooves 32 for accommodating the extension wires 12a and 12b of the coil 12 so as not to protrude from the outer diameter of the connecting member 3. Furthermore, on the circuit board 4 side of the connection member 3, a fitting portion 33 formed by a small diameter portion having a diameter approximately equal to the inner diameter of the board protection tube 6 is formed. On the end face of the circuit board 4 side of the fitting portion 33, a fitting recess 34 for fitting the projection 4a formed at the end of the circuit board 4 in the longitudinal direction is formed (refer to FIG. 1).

In addition, the system is configured to fit the end of the ferrite core 11 on the side opposite to the core tip member 2 side in the fitting recess 31 of the connecting member 3, and at the same time insert the circuit board 4 The protrusion 4 a is fitted into the fitting recess 34 of the connecting member 3 and the substrate protection tube 6 is fitted into the fitting portion 33 of the connecting member 3. With this, the coil unit 1 is in a state of being coupled to the substrate protection tube 6 with the connecting member 3 interposed therebetween. When the coil portion 1 is coupled to the substrate protection tube 6 via the connection member 3, the outer circumference of the substrate protection tube 6 and the outer circumference of the connection member 3 coincide with each other.

At this time, the extension wires 12a and 12b of the coil 12 are extended to the circuit board 4 through the groove 32 of the connecting member 3. After that, the extension wires 12a and 12b of the coil 12 are soldered to the conductor pads 41a and 41b, and the conductor pads 41a and 41b are connected to both ends of the capacitor 42 provided on the circuit board 4. By this, a parallel resonance circuit between the coil 12 and the capacitor 42 is formed. The electronic pen 10 of this embodiment transmits and receives signals between itself and the position detection sensor of the position detection device through the parallel resonance circuit, thereby being able to indicate the position of the position detection device.

In addition, in the figure, although one capacitor 42 is provided on the circuit board 4, the capacitor 42 is actually provided by a plurality of capacitors for capacity adjustment. Of capacitors. In addition, the capacitor 42 constitutes a part of the component parts for realizing the function of the electronic pen.

The pen pressure detecting part 5 is arranged on the long side of the circuit board 4 The direction (axis center direction) is on the side opposite to the connecting member 3 side. The pen pressure detecting part 5 is, for example, a pressure-sensitive element arranged in a package member made of resin, and as described above, the pressure-sensitive part 53 and the connecting terminal part including the pressure-sensitive element 51 and the fitting part 52 are integrally formed by resin.

The connecting terminal portion 51 of the pen pressure detecting portion 5 is as shown in FIG. 2 and is provided with two upper and lower plate portions connected to the fitting portion 52. This plate part is used to sandwich the circuit board 4. In this case, the space between the two upper and lower plates is slightly narrower than the thickness of the circuit board 4, so that the circuit board 4 can be pinched. However, at one of these two plate portions (in this embodiment, the upper plate portion), as shown in FIGS. 1 and 2, it is provided with a pressure-sensitive The terminal member of the section 53 is connected to the terminals 51a and 51b by wires. The terminals 51a and 51b are arranged in a U-shape so as to rise from the upper surface of the plate portion on the upper side of the connection terminal portion 51 through the side surface and reach the lower surface. With this, if the circuit board 4 is pinched (connected) to the connection terminal portion 51, the terminals 51a and 51b of the connection terminal portion 51 and the terminals 41c and 41d of the circuit board 4 are automatically connected. At the circuit board 4, the terminals 41c and 41d are connected to one end and the other end of the capacitor 42 (refer to FIG. 1), and in the aforementioned resonance circuit, the coil 12 and the capacitor 42 are further connected in parallel Connected to form part of the resonant circuit.

The fitting part 52 is a part to be fitted with the substrate protection tube 6. The fitting part 52 is formed in a substantially cylindrical shape, for example. Although not shown However, the inner side of the fitting portion 52 is provided with a recessed portion to be fitted with the protruding portion 4b of the circuit board 4. In addition, the outer diameter of the fitting portion 52 is selected to be slightly larger than the inner diameter of the substrate protection tube 6 so as to be able to be firmly fitted with the substrate protection tube 6. On the other hand, when the substrate protection tube 6 is fitted to the fitting portion 52, the outer circumference of the substrate protection tube 6 and the outer circumference of the pressure-sensitive portion 53 coincide with each other. In addition, the fitting portion 52 is provided with an end portion facing the circuit board 4 side in order to enable easy insertion of the substrate protection tube 6 and gradually becomes larger than the diameter of the inner circumference of the substrate protection tube 6. The shape of a small inclined part.

The pressure-sensitive portion 53 is formed by mounting pressure-sensitive components in a cylindrical package made of resin or the like, and the outer circumference and shape of the package portion are slightly the same as the outer circumference and shape of the substrate protection tube 6.

FIG. 3 is a diagram for explaining the composition of the pen pressure detecting portion 5 in this example, which is mainly the pressure sensitive portion 53. In this example, the pressure-sensitive part 53 is a case where a pressure-sensitive part is constituted by a semiconductor element called a so-called MEMS (Micro Electro Mechanical System). In this embodiment, the variable capacity element for pressure sensing using this MEMS is referred to as an electrostatic capacitance type pressure sensing semiconductor element (hereinafter referred to as a pressure sensing element).

The pressure-sensing semiconductor device of this example is, for example, a pressure-sensing chip 500 made of MEMS technology as a semiconductor device, sealed in a cylindrical packaging member 510, for example.

The pressure sensor chip 500 is designed to use the applied pressure as The change in capacitance is detected. The pressure sensor chip 500 of this example is set in a rectangular parallelepiped shape of length×width×height=L×L×H, and for example, L=1.5mm and H=0.5mm.

The pressure sensor chip 500 of this example is composed of a first electrode 501, a second electrode 502, and an insulating layer (dielectric layer) 503 between the first electrode 501 and the second electrode 502. In this example, the first electrode 501 and the second electrode 502 are formed of a conductor made of single crystal silicon (Si). The insulating layer 503, in this example, is formed of an oxide film (SiO ₂ ).

On the side of the surface of the insulating layer 503 facing the first electrode 501, in this example, a circular recess 504 centered on the center of the surface is formed. With this recess 504, a space 505 is formed between the insulating layer 503 and the first electrode 501. In this example, the bottom surface of the recess 504 is set as a flat surface, and the radius R thereof is set as R=1 mm, for example. In addition, the depth of the recessed portion 504 is set to be about tens of μ to 100 μ in this example.

Due to the existence of this space 505, if the first electrode 501 is pressed from the surface 501a on the opposite side of the surface facing the second electrode 502, it will be able to bend in the direction toward the space 505 The way of folding to make displacement. The thickness of the single crystal silicon as an example of the first electrode 501 is set to a thickness that can be flexed by the applied pressure, and is set to be thinner than that of the second electrode 502.

In the pressure sensor chip 500 with the above-mentioned general structure, a capacitor is formed between the first electrode 501 and the second electrode 502 53C. On the other hand, if pressure is applied to the first electrode 501 from the surface 501a opposite to the surface of the first electrode 501 facing the second electrode 502, the first electrode 501 will bend and the first electrode 501 and the second electrode 501 will bend. The distance between the two electrodes 502 is shortened, and the value of the capacitance of the capacitor 53C is changed in an increasing manner. The amount of deflection of the first electrode 501 changes in accordance with the magnitude of the applied pressure. Therefore, the capacitor 53C is a variable-capacity capacitor corresponding to the pressure applied to the pressure sensor chip 500.

In this embodiment, the pressure sensor chip 500 having the general structure described above is provided with the surface 501a of the first electrode 501 receiving pressure. In FIG. 3, it is parallel to the upper surface 510a of the package 510 and opposite to the upper surface 510a. It is housed in the package 510 in a state of facing.

The package 510, in this example, is a package member 511 made of an electrically insulating material such as a ceramic material or a resin material, and the package member 511 is provided in the package member 511 to receive the pressure of the pressure sensor chip 500 The elastic member 512 at the side of the face 501a is formed.

Also, in this example, at the upper part of the surface 501a side of the first electrode 501 where the pressure sensor chip 500 of the packaging member 511 receives pressure, one of the pressure-receiving parts of the pressure sensor chip 500 is provided. The recess 511a of the size covered by the area is filled with an elastic member 512 made of, for example, silicone rubber in the recess 511a.

However, at the package 510, a through hole 513 is formed from the upper surface 510a to a part of the elastic member 512. In addition, the through hole 513 is configured to be provided in the outer frame The protrusion 102a of the frame body cover 102 of the body 101 is inserted. That is, in this embodiment, the electronic pen body 20 is housed in the outer housing 101 and the outer housing 101 is closed by the housing cover 102, and the housing cover 102. The movement of the electronic pen body 20 in the axial direction is restricted. However, the protrusion 102a of the housing cover 102 is at the pressure sensitive portion 53 of the pen pressure detecting portion 5 of the electronic pen body 20 At this point, it is in a state of being connected with the elastic member 512 interposed. Therefore, if writing pressure is applied to the core tip member 2 that protrudes from the electronic pen main body frame 201 of the electronic pen main body 20 and also protrudes from the outer frame 101, the entire electronic pen main body 20 can be It counteracts the elastic force of the elastic member 512 and displaces toward the frame cover 102 side.

In this embodiment, the housing cover 102 is configured to be able to displace the entire electronic pen body 20 against the elastic force of the elastic member 512 toward the housing cover 102 side, and is opposite to the outer housing 101 However, between the electronic pen body part 20 and the electronic pen body part frame 201, it is the same as shown in FIG. 1, and it is configured to have a gap corresponding to the amount of displacement corresponding to the applied pen pressure. δ.

Moreover, in this embodiment, as shown in FIGS. 1 and 3, when resin is filled in the hollow portion of the electronic pen body portion frame 201, the upper surface 510a of the package 510 of the pressure sensitive portion 53 is provided In a state of being exposed to the outside, and the upper surface 510a is formed inside the end surface of the housing cover 102 side of the electronic pen body 201. Therefore, a recess 20a is formed on the side of the housing cover 102 of the electronic pen body 20.

In addition, since the upper surface 510a of the package 510 of the pressure sensitive portion 53 is exposed to the outside, the part of the package member 511 of the through hole 513 and the elastic member 512 are also exposed to the outside. However, In this example, the entire package 510 of the pressure sensitive portion 53 is set to waterproof specifications. Therefore, there is no situation where water enters the inside from the exposed parts.

In this embodiment, the frame body cover 102, as shown in FIG. 1, is provided to fit in the concave portion 20a and leave a gap with the upper surface 510a of the package 510 of the pressure sensitive portion 53 The small-diameter portion 102b is formed so as to face each other with a distance of δ.

In addition, in this example, the diameter of the through hole 513 of the pressure-sensitive portion 53 of the pen pressure detecting portion 5 is set to be smaller than that of the protrusion 102a provided at the frame cover 102 of the outer frame 101 The diameter is slightly smaller. Therefore, the protrusion 102 a provided at the frame cover 102 of the outer frame 101 is always pushed into the elastic member 512 at the end of the through hole 513. In this way, the protrusion 102a provided at the frame cover 102 of the outer frame 101 can be inserted into the through hole 513 of the pressure sensitive portion 53 of the pen pressure detecting portion 5, and can be It is positioned in a state where the pressure in the axial direction is applied to the side of the pressure sensing element 500 that receives the pressure.

In this case, since the diameter of the through hole 513 is slightly smaller than the diameter of the protrusion 102a provided at the housing cover 102 of the outer housing 101, it is provided at the outer housing 101 The protrusion 102 a at the frame cover 102 is in a state of being elastically held by the elastic member 512. That is, the frame cover that is set on the outer frame 101 If the protrusion 102a at 102 is inserted into the through hole 513 of the pressure sensitive portion 53, it is held at the pressure sensitive portion 53. However, by pulling out the protrusion 102a provided at the frame cover 102 of the outer frame 101 with a specific force, the holding state by the pressure sensitive portion 53 can be easily released.

After that, as shown in FIG. 3, from the packaging member 511 of the pen pressure detecting portion 5, a first lead terminal 521 connected to the first electrode 501 of the pressure sensor chip 500 is derived, and also derived There is a second lead terminal 522 connected to the second electrode 502 of the pressure sensor chip 500. The first lead terminal 521 is electrically connected to the terminal 51 a of the connection terminal portion 51. In addition, the second lead terminal 522 is electrically connected to the terminal 51 b of the connection terminal portion 51.

The substrate protection tube 6 is formed of, for example, metal made of SUS (Steel Special Use Stainless), carbon material, synthetic resin, etc., and is a rigid tubular member that is difficult to bend or bend. Both ends of the substrate protection tube 6 become openings. The openings at both ends of these substrate protection tubes 6 are openings in a direction intersecting the axial direction. On the other hand, the opening portion of the substrate protection tube 6 on the side of the connecting member 3 serves as a fitting portion with the connecting member 3. In addition, the opening portion of the substrate protection tube 6 on the side of the pen pressure detecting portion 5 serves as a fitting portion with the fitting portion 52 of the pen pressure detecting portion 5.

Furthermore, the substrate protection tube 6 covers from one end in the axial direction to the other end, and is provided with a side opening 61 in the direction along the axial direction. The opening 61 is to extend the coil 12 The long wires 12a and 12b and the conductor pads 41a and 41b of the circuit board 4 are installed by soldering or the like. In addition, the opening 61 is capable of performing a laser cutting operation for cutting the connection of a capacitor that is not used as a resonance circuit in order to adjust the capacity of the capacitor 42.

The end of the circuit board 4 (the side where the terminals 41c and 41d are provided) is pinched at the connection terminal portion 51 of the pen pressure detecting portion 5, and the protruding portion 4b of the circuit board 4 is fitted into At the same time, the end portion of the substrate protection tube 6 opposite to the connecting member 3 is fitted into the fitting portion 52 of the pen pressure detecting portion 5 in the concave portion inside the fitting portion 52.

In this way, the coil unit 1, the connecting member 3, the circuit board 4, the board protection tube 6, and the pen pressure detecting unit 5 are combined side by side in the axial direction to form an integrated module component. In this embodiment, the module component is housed in the hollow part of the electronic pen main body frame 201. At this time, as shown in FIG. 1, a part of the ferrite core 11 of the coil 1 and the core tip member 2 protrude to the outside from the opening 201a on the tip side of the electronic pen body frame 201 . In addition, as described above, the upper surface 510a of the package 510 of the pressure-sensitive portion 53 of the pen pressure detecting portion 5, as shown in FIGS. 1 and 3, becomes the frame cover 102 of the electronic pen body 201 The end surface on the side is further inside, and is in a state in which a recessed portion 20a is formed.

As shown in FIG. 2, the side surface of the electronic pen main body frame 201 is formed with a resin input hole 201b for allowing molten resin to flow into the hollow portion and filling the hollow portion with resin. The melted resin flows into the electronic pen main body frame 201 Previously, the frame cover 102 side of the electronic pen main body frame 201 of the electronic pen main body 20 was closed by a resin filling jig of the same shape as the frame cover 102. In addition, the height of the small diameter part corresponding to the small diameter part 102b of the frame body cover 102 of this resin filling jig is set to be higher than the axis direction of the small diameter part 102b of the frame body cover 102 The height increases the amount of the aforementioned gap δ. In addition, the gap between the opening 201a of the electronic pen main body frame 201 and the ferrite core 11 constituting the core body is also closed by putty which can be easily removed later.

Then, in this state, the resin in the molten state is poured into the hollow part of the electronic pen main body frame 201 from the resin injection hole 201b on the side surface of the electronic pen main body frame 201, and the hollow part is filled with resin. Make filling. In Fig. 1 and Fig. 3, the part shown by the dots represents the filled resin 7. After the resin 7 is cured, the jig of the same shape as the frame body cover 102 is removed, and the putty provided on the side of the opening 201a is removed, and the resin injection hole 201b is closed by the cover body 201c. , And the electronic pen body 20 is completed.

After that, the electronic pen body 20 is inserted into the hollow portion of the outer frame 101, and the part of the ferrite core 11 that is not wound with the coil 12 and the core tip member 2 are removed from the opening of the outer frame 101 The part 101a protrudes. At this time, as described above, in the hollow portion of the outer frame 101, a recess 20a is formed at the end of the electronic pen body portion 20 on the side opposite to the core tip member 2 side, and the pen pressure detection The upper end surface of the package 510 of the pressure sensitive part 53 of the part 5 is exposed, and the pressure sensitive part 53 The through hole 513 is in a state where the opening is exposed.

After that, while inserting the small-diameter portion 102b of the frame body cover 102 into the concave portion 20a, while inserting the protruding portion 102a into the through hole 513 of the pressure-sensitive portion 53 of the pen pressure detecting portion 5 and pushing it all the way to the elastic member 512 places. After that, the frame body cover 102 is joined and fixed to the outer frame body 101. Through the above steps, the electronic pen 10 is completed.

[Outline of circuit configuration of electronic pen 10 and position detection device]

Next, referring to FIG. 4, for the electronic pen 10 of this embodiment used together to detect the position indicated by the electronic pen and to be applied to the pen pressure detection of the core tip member 2 of the electronic pen 10 The circuit configuration example of the embodiment of the position detection device 300 of the electromagnetic induction method (detected) will be described. In FIG. 4, a block diagram showing the circuit configuration of the electronic pen 10 and an example of the circuit configuration of the position detection device 200 is shown at the same time.

The electronic pen 10, as described above, is integrated by combining the coil part 1, the connecting member 3, the circuit board 4, the substrate protection tube 6, and the pen pressure detecting part 5 side by side in the axial direction. It is composed of module parts, and as shown in FIG. 4, the coil 12, the capacitor 42 of the circuit board 4, and the pressure sensitive part 53 of the pen pressure detecting part 5 are formed as pressure sensitive parts. The variable capacitance capacitor 53C formed by the sensing chip 500 is a parallel resonance circuit between these.

The pressure sensing chip 500 of the pressure sensing portion 53 of the pen pressure detecting portion 5, when a pen pressure is applied to the core body front-end member 2, the electronic notebook The entire body portion 20 is displaced toward the housing cover 102 side with the elastic member 512 interposed therebetween, and thereby receives a pressure corresponding to the applied pen pressure, so that the electrostatic capacitance becomes variable.

At the position detection device 300, the X-axis direction loop coil group 302 and the Y-axis direction loop coil group 303 are laminated to form a coordinate detection sensor 301 of an electromagnetic induction method. Each loop coil group 302, 303 is formed of 40 rectangular loop coils, for example. The loop coils constituting the loop coil groups 302 and 303 are arranged side by side at equal intervals and sequentially overlapped.

In addition, the position detection device 300 is provided with a selection circuit 306 connected to the X-axis direction loop coil group 302 and the Y-axis direction loop coil group 303. The selection circuit 306 selects one of the two loop coil groups 302 and 303 in sequence.

Furthermore, the position detection device 300 is provided with an oscillator 304, a current driver 305, and a switching connection circuit 307, and a signal receiving amplifier 308, and a detector 309, and a low-range filter 310, and a sample and hold The circuit 312, the A/D conversion circuit 313, the synchronous detector 316, and the low-domain filter 317, and the sample-and-hold circuit 318, and the A/D conversion circuit 319, and the processing unit 314.

The oscillator 304 is an oscillator 304 that generates an AC signal with a frequency f0 and supplies it to the current driver 305 and the synchronous detector 316. The current driver 305 converts the AC signal supplied from the oscillator 304 into current, and sends it to the switch connection circuit 307. The switching connection circuit 307 is derived from the control processing unit 314 described later Control, and switch the connection destination (transmitting-side terminal T, receiving-side terminal R) to which the loop coil selected by the selection circuit 306 is connected. Among these connection targets, the current driver 305 is connected to the transmitting-side terminal T, and the receiving amplifier 308 is connected to the receiving-side terminal R.

The induced voltage generated at the loop coil selected by the selection circuit 306 is sent to the receiving amplifier 308 via the selection circuit 306 and the switch connection circuit 307. The receiving amplifier 308 amplifies the induced voltage supplied from the loop coil and sends it to the detector 309 and the synchronous detector 316.

The detector 309 detects the induced voltage generated at the loop coil, that is, the received signal, and sends it to the low-domain filter 310. The low-domain filter 310 has a blocking frequency that is sufficiently lower than the aforementioned frequency f0, and converts the output signal of the detector 309 into a DC signal and sends it to the sample-and-hold circuit 312. The sample-and-hold circuit 312 holds the voltage value at a specific time sequence of the output signal of the low-domain filter 310 (specifically, at a specific time sequence in the receiving period), and sends it to A/D (Analog to Digital) Conversion circuit 313. The A/D conversion circuit 313 converts the analog output of the sample-and-hold circuit 312 into a digital signal, and sends it to the processing unit 314.

On the other hand, the synchronous detector 316 synchronously detects the output signal of the receiving amplifier 308 by the AC signal from the oscillator 304, and adjusts the level corresponding to the phase difference between these The signal is sent to the low-domain filter 317. This low-domain filter 317 is equipped with A cutoff frequency that is sufficiently lower than the frequency f0 is prepared, and the output signal of the synchronous detector 316 is converted into a DC signal and sent to the sample-and-hold circuit 318. The sample-and-hold circuit 318 holds the voltage value at a specific time sequence of the output signal of the low-pass filter 317 and sends it to the A/D (Analog to Digital) conversion circuit 319. The A/D conversion circuit 319 converts the analog output of the sample-and-hold circuit 318 into a digital signal and outputs it to the processing unit 314.

The processing unit 314 controls each unit of the position detection device 300. That is, the processing unit 314 controls the selection of the loop coil at the selection circuit 306, the switching of the switching connection circuit 307, and the timing of the sample and hold circuits 312 and 318. The processing unit 314 circulates the coil group 302 in the X-axis direction and the coil group 303 in the Y-axis direction based on the input signals from the A/D conversion circuits 313 and 319 to transfer the signals for a certain duration of transmission. The radio wave is used for transmission.

In each loop coil of the X-axis direction loop coil group 302 and the Y-axis direction loop coil group 303, an induced voltage is generated by the electric wave transmitted from the electronic pen 10. The processing unit 314 calculates the coordinate values of the indicated position in the X-axis direction and the Y-axis direction of the electronic pen 10 based on the level of the voltage value of the induced voltage generated at each loop coil. In addition, the processing unit 314 detects the pen pressure based on the phase difference between the transmitted radio wave and the received radio wave. In this way, the electronic pen 10 of the electromagnetic induction method of this embodiment and the position input device 300 of the electromagnetic induction method shown in FIG. 4 can constitute an input device.

[Effects of the first embodiment]

In the electronic pen 10 of this embodiment, all the parts constituting the electronic pen 10 except for a part of the ferrite core 11 and the core tip member 2 are housed in the electronic pen main body frame 201 The hollow part is filled with resin to prevent dust and water. That is, the electronic components and electrical connection parts constituting the electronic pen 10 are covered by resin and molded, so that dust-proof and waterproof measures are surely implemented.

However, according to the electronic pen 10 of this embodiment, the pen pressure detecting portion 5 is provided on the side of the electronic pen body portion frame (inner frame) of the electronic pen body portion 20 opposite to the core front end member 2 At the end, it is engaged with the frame cover 102 via the elastic member 512. The pen pressure detecting section 5 is configured to be able to displace the entire body of the electronic pen body 20 via the elastic member 512 toward the housing cover 102 when a pen pressure is applied to the core tip member 2 The pressure generated by an event is detected by the pressure sensor chip 500 and detected as a change in the electrostatic capacitance, which is an electrical quantity.

That is, even if the pen pressure detecting portion 5 is housed in the electronic pen body portion frame (inner frame) of the electronic pen body portion 20 and molded with resin, it can be applied to the core The pen pressure at the front end member 2 of the body is detected.

In the electronic pen 10 of this embodiment, since the rubber gasket or O-ring is not used in the same way as the patent document 1 or the patent document 2 described at the beginning, there is no need for this some Taking into account the deterioration of the parts for dust and water resistance, it can withstand the influence of changes over the years, and there will be no such dust-proof and waterproof parts that become relative to the displacement when the pen pressure is tested. Under the load condition, the pen pressure can be detected correctly.

In addition, in this embodiment, since the pressure sensing chip 500 made of semiconductor elements is used, and the package 510 of the pressure sensing portion 53 is made of waterproof specifications, even if moisture enters the pressure sensing portion 53 Between the connecting hole 513 and the protrusion 102a of the frame cover 102 fitted with the connecting hole 513, the function of the pressure sensing chip 500 inside the package 510 will not be damaged.

[Modifications of the first embodiment]

In the above-mentioned first embodiment, in order to combine the coil part 1 with the circuit board 4 and the pen pressure detecting part 5, the connecting member 3 and the substrate protection tube 6 are used, and the frame body of the pen pressure detecting part 5 is used. The composition is specially designed. However, the coil unit 1, the circuit board 4, and the pen pressure detecting unit 5 can be accommodated in the hollow portion of the electronic pen body 201 in a state where they are electrically connected. It is filled with resin, therefore, the connecting member 3 and the substrate protection tube 6 may not be used, and the structure of the frame of the pen pressure detecting part 5 may not adopt the above-mentioned general special design. .

In addition, in the above-mentioned first embodiment, the ferrite core 11 is made to be longer than the portion where the coil 12 is not wound, and the portion that is not wound with the coil 12 is set to be relatively electronic. Pen body part frame 201 to And the outer frame body 101 is inside the hollow part and more protrudes outside. However, the system is not limited to this configuration. For example, the length of the core front end member 2 may be longer, and the joint between the ferrite core 11 and the core front end member 2 may be set as the position. Inside the hollow part of the electronic pen body 201. However, as in the first embodiment, it is assumed that the part of the ferrite core 11 where the coil 12 is not wound is more protruding than the hollow part of the electronic pen main body frame 201 and the outer frame 101 In an external situation, it has the advantage of being able to make the electromagnetic induction coupling between it and the position detection sensor stronger.

[Second Embodiment]

The electronic pen 10 of the first embodiment described above has a structure in which an electronic pen main body 20 is provided in the hollow portion of the outer housing 101. The electronic pen main body 20 can be used as a so-called cassette 3 as a writing instrument. Replacement refills for ball pens, etc. The second embodiment is an example of an electronic pen that utilizes the feature of the electronic pen main body 20 that can be used as a cassette.

In addition, the electronic pen main body 20 can be used not only as a cassette, but also as an exchange refill for a striking ballpoint pen. That is, it is possible to connect the electronic pen main body 20 to the connecting part between the striking mechanism and the exchange refill. However, in this case, the small-diameter portion 102b and the protrusion 102a of the housing cover 102 in the first embodiment described above are provided at the coupling portion of the tapping mechanism to which the electronic pen body portion 20 is coupled.

In the second embodiment, in consideration of the above points, as one or more of the exchange refills of the so-called multi-color ballpoint pen, an electronic pen body having the same structure as the electronic pen body 20 is used. An example of an electronic pen.

FIG. 5 is a structural diagram showing the appearance of the electronic pen 10M of this example. The example of FIG. 5 also shows the state where the outer frame 101M of the electronic pen 10M is made of transparent synthetic resin and can be seen through to the inside.

The outer frame 101M of the electronic pen 10M has the same structure as the frame and the striking cam mechanism of the striking multi-color ball pen. In addition, as one of the exchange refills, an electronic pen main body having the same configuration as the electronic pen main body 20 described above is used. When the length and diameter of the electronic pen body and the structure and size of the pen tip side are the same as the refills of the commercially available ballpoint pens, it is possible to use many of the commercially available percussion types. The frame of the colored ball pen and the striking cam mechanism. In this outer frame 101M, in this example, three cassettes 9B, 9R, and 9E are accommodated.

Also, in this example, among the three cassettes 9B, 9R, and 9E, cassettes 9B and 9R are refills for ball pens, cassette 9B is refills for ball pens with black ink, and cassette 9R is It is the refill of the red ball pen. The cassette 9E adopts the structure of a cassette for electronic pens. The cartridge 9E for this electronic pen is configured to be the same size as the refill of the multicolor ballpoint pen, but is configured to be the same as the electronic pen body 20 in the first embodiment described above in terms of appearance. same.

An opening 101Ma is formed at one end side of the outer frame 101M in the axial direction. When any one of the cassettes 9B, 9R, 9E is slid in the axial direction by a knocking mechanism , The front end of the core body, which becomes its nib, passes through the opening 101Ma and protrudes to the outside. The cassettes 9B, 9R, and 9E, in a state where they are not slidably moved in the axial direction by the striking mechanism, are as shown in FIG. 5, and each of them includes the entire tip of the pen tip. It is housed in the hollow part of the outer frame 101M and is in a protected state.

The percussion mechanism of the electronic pen 10M is composed of percussion rods 19B, 19R, and 19E with fitting parts 19Ba, 19Ra, and 19Ea for fitting into each of the cassettes 9B, 9R, and 9E, and a spring receiving member 17 , And the coil springs 18B, 18R, and 18E arranged between the respective fitting portions 19Ba, 19Ra, and 19Ea of the cassettes 9B, 9R, and 9E and the spring receiving member 17 are constituted. In addition, the fitting portion 19Ea for the cassette 9E for the electronic pen is provided with the small diameter portion 102b and the protrusion 102a of the housing cover 102 in the above-mentioned first embodiment as described above.

The spring receiving member 17 is fixed to a specific position in the axial direction in the hollow portion of the outer frame 101M for installation. The spring receiving member 17 is formed with through holes 17B, 17R, and 17E through which the cassette frames 91B, 91R, and 91E of the cassettes 9B, 9R, and 9E are inserted. Each of the cassettes 9B, 9R, and 9E is inserted into each of the through holes 17B, 17R, and 17E of the spring receiving member 17 and each of the coil springs 18B, 18R, and 18E, and is combined with the knock The fitting parts 19Ba, 19Ra, and 19Ea of the striking rods 19B, 19R, and 19E are fitted for fitting and are installed in the electric The percussion mechanism of the subpen 10M.

At the portion of the outer frame 101M where the striking rods 19B, 19R, and 19E are housed, a through-hole slit (not shown in FIG. 5) is provided. The through-hole slit is configured to be able to A part of the beaters 19B, 19R, and 19E is exposed to the outside and each of the beaters 19B, 19R, and 19E can be moved in the axial direction.

The electronic pen 10M is the same as the well-known multi-color ball pen. When one of the striking rods 19B, 19R, 19E is slid to the side of the opening 101Ma, the electronic pen card is fitted with the striking rod When the front end of the core of one of the cassettes 9B, 9R, and 9E is in a state of protruding from the opening 101Ma, the locking portions (not shown) of the striking rods 19B, 19R, and 19E are connected to the The engaging portion formed in the hollow portion of the outer frame 101M is engaged with each other, and is in a locked state that is locked in this state.

Also, in this locked state, if other percussive rods are slidably moved to the side of the opening 101Ma, the locking system of the percussive rods in the locked state is released, and the coil springs 18B, 18R, For one of 18E, the tapping rod is returned to the original state shown in FIG. 5. After that, the striking rod that is slidably moved from the rear can be brought from the opening 101Ma at the front end of the core of one of the cassettes 9B, 9R, and 9E to be fitted with the striking rod. When protruding to the outside, it becomes a locked state.

Hereinafter, in the same way, by sliding the tapping rod, it is possible to modify the cassette whose tip is protruded from the opening 101Ma. Change. When the sliding movement of one of the percussion bars 19B, 19R, and 19E stops on the way to the locked state, the other percussion bars in the locked state are unlocked, and the percussion bar is Return to the protection state of FIG. 5 by one of the coil springs 18B, 18R, and 18E.

According to the electronic pen 10M of this second embodiment, it can be configured to have the function of a ball pen as a writing instrument and the function of an electronic pen. In addition, even when a cartridge for an electronic pen is provided as a refill, the water resistance is high. For example, even if the electronic pen 10M is dropped into the water, it is not suitable. It has the advantage of being used as an electronic pen with a compromised function.

[Third Embodiment: Electronic pen with capacitive coupling method]

Although the electronic pen of the above-mentioned embodiment is an electromagnetic induction method, the present invention can also be applied to a case where an electronic pen of an electrostatic capacitance coupling method is constituted. 6 is a cross-sectional view for explaining the important part of the example of the electronic pen main body 20C in the third embodiment in the electronic pen of the electrostatic capacitance coupling method in which the present invention is applied, and is a cross-sectional view for the electronic pen The example of the structure on the core side of the main body is shown here. In addition, in the electronic pen main body 20C of the example of FIG. 6, for the same constituent parts as the electronic pen main body 20 of the electronic pen 10 of the first embodiment described above, the same numbers are used with the suffix C added. Component symbol.

In the electronic pen body 20C of the electronic pen of the third embodiment, a signal transmitting circuit 43 is provided on the circuit board 4C, and a rechargeable power supply circuit (not shown in FIG. 6) is provided. In addition, the electronic pen main body 20C is provided with a conductive core 2C, and the signal from the signal transmitting circuit 43 is supplied to the position detection device of the electrostatic capacitance coupling method through the core 2C.

Therefore, in the electronic pen body portion 20C of the electronic pen of the third embodiment, the coil portion 1C and the connecting member 3C, and the circuit board 4C that is held and protected by the board protection tube 6C and the connection The structure of the connecting portion between the members 3C is different from that of the electronic pen main body 20 of the first embodiment. The other parts are the electrical connection and mechanical connection between the circuit substrate 4C and the pen pressure detecting portion 5 that are held and protected by the substrate protection tube 6C, and the electronic pen body The configuration in which the hollow portion in the portion frame 201C is filled with the resin 7C is the same as that of the first embodiment.

As shown in FIG. 6, in this third embodiment, the coil portion 1C is configured by winding a coil 12C around a ferrite core 11C formed with a through hole 11Ca. Also, similar to the electronic pen main body 20 of the first embodiment, the end of the ferrite core 11C in the axial direction is accommodated in the fitting recess 31C of the connecting member 3C, so that the coil portion 1C is Combine with the connecting member 3C.

The core 2C is made of a conductive rod-shaped body made of metal or a material mixed with conductive metal powder in resin. This core 2C is made of a ferrite core 11C. The through hole 11Ca is fitted into the core fitting portion 35C provided at the bottom surface of the fitting recess 31C of the connecting member 3C.

In this third embodiment, the AND circuit of the connecting member 3C The fitting portion 33C between the boards 4C is the same as the connection terminal portion 51 of the pen pressure detecting portion 5 in the first embodiment, and is configured to pinch the circuit board 4C. In addition, at the connecting member 3C, the conductive pattern 45 is connected to the signal output terminal of the signal transmitting circuit 43 arranged on the circuit board 4C for electrical connection, and the conductive member 36C is always formed To the board portion of the fitting portion 33C that holds the circuit board 4C. This conductive member 36C, as shown by the thick line in FIG. 6, has been extended to the core fitting portion 35C provided at the bottom surface of the fitting recess 31C of the connecting member 3C, and is embedded with The core 2C fitted at the core fitting portion 35C is electrically connected. That is, if the core 2C is fitted into the core fitting portion 35C, it will be in a state of being electrically connected to the signal output terminal of the signal transmitting circuit 43.

In addition, in the third embodiment, the coil 12C is also electrically connected to the circuit board 4C by the extension wires 12Ca and 12Cb, as in the case of the first embodiment.

However, in the electronic pen main body 20C of this third embodiment, as shown in FIG. 6, the ferrite core 11C is all housed in the electronic pen main body frame 201C, and is configured to There are voids between the core 2C and the through-hole 11Ca of the ferrite core 11C, and the resin 7C is also filled.

[Circuit configuration of the electronic pen body 20C]

FIG. 7 is a diagram showing an example of the electronic circuit of the electronic pen main body 20C of the electronic pen of the third embodiment. This third implementation The electronic pen body portion 20C of the electronic pen of the third embodiment is equipped with a signal transmitting circuit 43, and from this signal transmitting circuit 43, the position detection signal is transferred from the core body 2C of the electronic pen body portion 20C of the third embodiment It is sent to the position detection sensor of the electrostatic capacitance type position detection device corresponding to the electronic pen housed in the external housing of the electronic pen main body 20C. The position detection sensor is configured to detect the position indicated by the electronic pen by detecting the signal for position detection from the electronic pen.

In this case, the signal transmitting circuit 43, in this example, is constituted by an oscillation circuit. This oscillation circuit is, for example, an LC oscillation circuit that utilizes resonance caused by a coil and a capacitor (not shown). Constituted. In addition, the two ends of the variable capacity capacitor 53C formed by the pressure sensitive portion 53 of the pen pressure detecting portion 5 are formed as part of the resonance circuit as shown in FIG. 7 The signal sending circuit 43 at the circuit board 4C is electrically connected. The oscillating circuit constituting the signal transmitting circuit 43 generates a signal that changes the frequency in response to the capacity of the variable capacitance capacitor 53C formed by the pressure sensitive portion 53 of the pen pressure detecting portion 5, and combines the generated signal The signal is supplied to the core 20C.

In addition, as described above, in the electronic pen body 20C of the third embodiment, the coil 12C wound on the ferrite core 11C is set to charge the power supply of the signal transmitting circuit 43 Part of the circuit. That is, in this example, the electronic circuit formed on the circuit board 4C is as shown in FIG. 7, in addition to the signal transmitting circuit 43, it also has a generator for driving the signal transmitting circuit. The driving voltage generating circuit 110 (power supply circuit) of the driving voltage (power supply voltage) of 43. This drive voltage generating circuit 110 has the following circuit configuration, which includes an electric double-layer capacitor 111 as an example of an electric storage element, a rectifier diode 112, and a voltage conversion circuit 113, and Capacitor 114.

When the electronic pen equipped with the electronic pen body part 20C of the third embodiment is attached to a charger (not shown), the AC magnetic field generated by the charger generates induced electric power at the coil 12C. , And charge the electric double layer capacitor 111 through the diode 112. The voltage conversion circuit 113 receives the voltage stored in the electric double-layer capacitor 111, converts it into a certain voltage, and supplies it as a power source for the signal transmitting circuit 43.

In addition, when the electronic pen of this third embodiment performs a normal operation of sending a signal to the position detection sensor of the position detection device, as shown in FIG. 7, the coil 12C is configured to become a fixed potential (in In this example, it becomes the ground potential (GND), and the coil 12C functions as a shielding electrode provided around the core 2C. In addition, the fixed potential of the coil 12C during the normal operation of the electronic pen of the third embodiment is not limited to the ground potential, and may be the positive side potential of the power source (drive voltage), or the power source (drive voltage). The potential between the positive side potential of the voltage) and the ground potential.

[Outline of position detection device of electrostatic capacitance coupling method]

Figure 8 is used to use the data shown in Figure 7 for receiving and receiving The position detection device 400 of the coordinate detection sensor of the electrostatic capacitance coupling method that detects the position on the sensor by the signal from the electronic pen 10C constituted by the electronic pen body part 20C and detects the pen pressure is illustrated in the area Block diagram.

The position detection device 400 of this example is as shown in FIG. 8 and consists of a coordinate detection sensor (hereinafter, abbreviated as a sensor) 410 of an electrostatic capacitance coupling method and a sensor 410 connected to this sensor 410 The pen detection circuit 420 is formed. The sensor 410, although the cross-sectional view is omitted in this example, is formed by sequentially stacking a first conductor group 411, an insulating layer (not shown), and a second conductor group 412 from the lower layer side By. The first conductor group 411 is, for example, a plurality of first conductors 411Y1, 411Y2, ... 411Ym (m is a positive integer) extending in the horizontal direction (X-axis direction) separated from each other by a predetermined interval and arranged in parallel. Arranged in the Y-axis direction. In addition, the second conductor group 412 extends in the longitudinal direction (Y-axis direction) orthogonal to the first conductor group 411 and is arranged side by side in the X-axis direction at a predetermined interval apart from each other.

In this way, the sensor 410 of the position detection device 400 is equipped with a sensing pattern formed by intersecting the first conductor group 411 and the second conductor group 412 to detect the position indicated by the electronic pen 10C The composition. In addition, in the following description, regarding the first conductors 411Y1, 411Y2, ...411Ym, when it is not necessary to distinguish between the conductors, the conductors are referred to as the first conductor 411Y. Similarly, for the second conductors 412X1, 412X2, ... 412Xn, when it is not necessary to distinguish between the individual conductors, the conductors are referred to as the second conductor 412X.

The pen detection circuit 420 is composed of a selection circuit 421, an amplifier circuit 422, and a band pass filter 423, a detection circuit 424, and a sample-and-hold circuit 425, which are used as the input/output interface between the sensor 410 and the sensor 410, and AD (Analog to Digital) conversion circuit 426 and control circuit 427 are formed.

The selection circuit 421 selects one conductor 411Y or 412X from the first conductor group 411 and the second conductor group 412 based on the control signal from the control circuit 427. The conductor selected by the selection circuit 421 is connected to the amplifier circuit 422, and the signal from the electronic pen 10C is detected by the selected conductor and amplified by the amplifier circuit 422. The output of the amplifying circuit 422 is supplied to the band pass filter 423, and only the frequency components of the signal sent from the electronic pen 10C are extracted.

The output signal of the band-pass filter 423 is detected by the detection circuit 424. The output signal of the detection circuit 424 is supplied to the sample-and-hold circuit 425, and after the sampled signal from the control circuit 427 is sampled and held at a specific timing, the AD conversion circuit 426 performs Is converted to a digital value. The digital data from the AD conversion circuit 426 is read and processed by the control circuit 427.

The control circuit 427 operates by sending control signals to the sample-and-hold circuit 425, the AD conversion circuit 426, and the selection circuit 421 by means of programs stored in the internal ROM. Also, the control circuit 427 is based on the number derived from the AD conversion circuit 426 Position data, and calculate the position coordinates on the sensor 410 indicated by the electronic pen 10C. Furthermore, the control circuit 427 detects the pen pressure detected by the pen pressure detecting unit 5 of the electronic pen 10C.

In addition, in the electronic pen 10C of this example, the signal transmitting circuit 43 of the circuit board 4C is configured to have only an oscillation circuit, and the pen pressure is transmitted to the position detection device as a change in its oscillation frequency. However, the line is not limited to this. The signal generating circuit can also be constituted by an oscillating circuit and a circuit for specific modulation of its oscillating signal, and the pen pressure information can be transmitted to the position detection device as an ASK signal, for example.

As described above, according to the third embodiment, it is possible to realize an electrostatic coupling electronic pen with high dust and water resistance and a pen pressure detection function.

In addition, in the case of the electronic pen of the electrostatic capacitance coupling method of the third embodiment, the generating circuit as the driving power source of the signal transmitting circuit is constructed by winding a coil on a magnetic core and using electromagnetic Induction is used to charge an internal electric double-layer capacitor as an example of a storage element, but the system is not limited to this. For example, of course, it is also possible to use a configuration in which electric power is transmitted through electric field coupling or electric waves and the electric storage element accommodated in the electronic pen body of the electronic pen is stored.

[Other Embodiments and Other Modifications]

In the above-mentioned embodiment, an electronic pen equipped with an electronic pen body (inner frame) is housed in the hollow part of the outer frame. The main body part contains parts for electronic pens in the hollow part of the main body of the electronic pen (inner frame), and the hollow part of the main body of the electronic pen (inner frame) is filled with resin.

However, in the electronic pen body of the electronic pen of the present invention, it is also possible to use resin to make the parts for the electronic pen without having the frame (inner frame) of the electronic pen body. Molded composition.

Figure 9 is a method for manufacturing an electronic pen body that does not have an electronic pen body (inner frame) and uses resin to mold the parts for the electronic pen. Illustrate the picture. In the example of FIG. 9, the component components of the electronic pen are the same as those of the electronic pen 10 of the first embodiment, and the components that are the same as the electronic pen 10 are given the same component symbols.

In this example, a mold member 210 for molding as shown in FIG. 9(A) is prepared. The mold member 210 for molding, in this example, is formed by cutting the electronic pen body portion frame (inner frame) 201 of the electronic pen body portion 20 along the direction of its axis. Divided into 2 semi-tubular cut-in-half members 211 and 212. One of the half-cut members, in this example, the half-cut member 211 is formed with a resin input hole 211a through which molten resin can flow.

Also, in this example, in the other half-cut member 212 of the mold member 210 for molding, the coil portion 1, the connecting member 3, the circuit board 4, the board protection tube 6, and the pen pressure detecting portion are accommodated. 5Combined side by side in the axial direction to make an integrated module part. After that, for The half member 212 is cut to join the half member 211, and the above-mentioned module parts are housed in the hollow portion of the mold member 210 for molding (refer to FIG. 9(B)).

Furthermore, the opening of the mold member 210 for molding and sealing on the side opposite to the core front end member 2 is closed by a resin filling jig 220 having the same configuration as the frame body cover 102. In addition, if the height in the axial direction of the small diameter portion 220b corresponding to the small diameter portion 102b of the frame body cover 102 of the resin filling jig 220 is set to be the same as the small diameter portion 102b of the frame body cover 102, then It becomes the amount that cannot form the aforementioned gap δ between it and the small diameter portion 102b of the frame body cover 102. Therefore, the height of the small diameter portion 220b of the resin filling jig 220 in the axial direction is set to be relatively high. The height of the small-diameter portion 220b corresponding to the small-diameter portion 102b of the frame body cover 102 in the axial direction increases the amount of the gap δ.

In addition, the gap between the opening of the mold member 210 for molding and the ferrite core 11 constituting the core is closed by putty or the like.

After that, the molten resin is poured into the hollow portion of the molding member 210 for molding from the resin input hole 211a formed at the half member 211 of the molding member for molding 210, as shown in FIG. 9(B) As indicated by the additional dots, generally, the hollow portion of the mold member 210 for molding is filled with the resin 7.

After that, if the resin 7 is cured, the half-cut member 211 and the half-cut member 212 of the mold member 210 for molding are removed. As a result, as shown in FIG. 9(C), the coil part 1, the connecting member 3, the circuit board 4, the substrate protection tube 6, and the pen pressure detecting part 5 are formed on the axis. The module parts integrated side by side in the direction are combined with the resin 7 to cover the electronic pen body 20X and molded.

The electronic pen main body 20X generally formed as described above is housed in the hollow part of the outer frame 101 shown in FIG. 1, and the outer frame 101 is closed by the frame cover 102, thereby, It can constitute the electronic pen of this example.

[Other examples of pen pressure detection department]

In the above-mentioned embodiment, the pen pressure detection unit constituting the pressure detection unit uses a pressure sensor chip that detects the applied pen pressure as a change in electrostatic capacity. However, the pen pressure detection unit is not limited to a configuration that detects the applied pen pressure as a change in electrostatic capacity. The example in FIG. 10 is an example of a configuration that detects the applied pen pressure as a change in inductance. In the example of FIG. 10, the same reference numerals are assigned to the same components as in the aforementioned first embodiment.

In this example, too, as shown in FIG. 10, the pen pressure detecting portion 5L is provided with a connecting terminal portion 51L for coupling with the circuit board 4, and an insert for fitting with the board protection tube 6 The joining portion 52L and the pressure-sensitive portion 53L, however, are housed in the package 510L of the pressure-sensitive portion 53L with a coil member 56 in which a coil 55 is wound on a magnetic core (for example, a ferrite core 54).

As shown in FIG. 10, in this example, the coil member 56 of the coil 55 is wound around the ferrite core 54 so that the ferrite core The axis direction of 54 becomes the way of the axis direction of the housing 201 of the electronic pen body, and is accommodated in the package 510L of the pressure sensitive portion 53L. In addition, the coil member 56 is provided so that the end surface of the ferrite core 54 in the axial direction is closer to the inside of the package 510L than the upper end surface 510La of the package 510L.

On the other hand, in this example, the surface where the small diameter portion 102Lb of the frame body cover 102L meets the upper end surface 510La of the package 510L of the pressure sensitive portion 53L of the pen pressure detecting portion 5L is attached. An elastic member 57 made of elastic rubber, for example, is provided. In addition, at the small-diameter portion 102Lb of the frame body cover 102L, a magnetic body magnetically coupled with the ferrite core 54 is provided, for example, a permanent magnet 58 is provided. Therefore, the permanent magnet 58 provided at the small-diameter portion 102Lb of the frame body cover 102L faces the coil member 56 of the pen pressure detecting portion 5L with the elastic member 57 interposed therebetween.

However, in this case, based on the fact that the pen pressure is applied to the core tip member 2, the entire body of the electronic pen is displaced toward the housing cover 102L side via the elastic member 57. By this, the ferrite core 54 of the coil member 56 and the distance between the coil 55 and the permanent magnet 58 are changed, and the inductance value formed by the two changes in response to the pen pressure.

In this example, as shown in FIG. 11(A), the coil 55 of the coil member 56 is connected in parallel to the coil 12 and the capacitor 42 to form a parallel resonance circuit. Therefore, in the case of this example, due to the change in the inductance value caused by the change in the distance between the coil member 56 and the permanent magnet 58 corresponding to the pen pressure, the resonance frequency of the resonance circuit is changed, and the position is detected At device 300, the system can be used as This change in resonance frequency is the same as in the case of the first embodiment, and the pen pressure is detected.

In addition, the example of FIG. 10 can also be applied to the electronic pen main body 20C of the electronic pen 10C of the electrostatic capacitance coupling method of the third embodiment. In this case, as shown in FIG. 11(B), the coil 55 is connected so as to become a part of the resonance circuit for determining the oscillation frequency of the signal transmitting circuit 43. Therefore, the position detection device 400 can detect the pen pressure applied to the electronic pen in the same manner as the electronic pen 10C of the electrostatic capacitance coupling method of the third embodiment.

In addition, the magnetic body provided at the small diameter portion 102Lb of the frame body cover 102L and magnetically coupled with the ferrite core 54 is not limited to the permanent magnet 58 of the above-mentioned example, and may be, for example, iron Ferrite sheet such as ferrite sheet.

1‧‧‧Coil section

2‧‧‧Core tip component

2a‧‧‧Protrusion

3‧‧‧Connecting member

4‧‧‧Circuit board

5‧‧‧Pen pressure detection part

6‧‧‧Substrate protection tube

7‧‧‧Filled resin

10‧‧‧Electronic pen

11‧‧‧Ferrite core

11a‧‧‧Concave hole

12‧‧‧Coil

12a‧‧‧Extension cord

12b‧‧‧Extension cord

20‧‧‧Electronic pen body

31‧‧‧Insert hole

33‧‧‧Mosaic part

34‧‧‧Insert hole

41a, 41b‧‧‧Conductor gasket

41c、41d‧‧‧Terminal

42‧‧‧Capacitor

51‧‧‧Connecting terminal

51a, 51b‧‧‧Terminal

52‧‧‧Mosaic part

53‧‧‧Pressure Department

101‧‧‧External frame

101a‧‧‧Opening

102‧‧‧Frame cover

102a‧‧‧Protrusion

102b‧‧‧Small diameter part

201‧‧‧Electronic pen body part frame (internal frame)

δ‧‧‧Gap

Claims (16)

An electronic pen, which is contained in a hollow part of a cylindrical outer frame, at least includes: a constituent member for realizing the function of an electronic pen including a core body, and a circuit board configured with at least a part of the aforementioned constituent member, the The electronic pen is characterized in that: in the hollow part of the cylindrical inner frame body housed in the hollow part of the outer frame body, the constituent members and the circuit board are housed, and the front end of the core body The core system is housed in the inner frame in a state in which the core system is housed in the inner frame, and the hollow part of the inner frame is in a state where it protrudes from the first opening on one side of the axial direction of the inner frame Resin is filled, and the constituent member includes a magnetic core and a coil wound on the magnetic core, at least the coil wound on the magnetic core, and the coil and the circuit The electrical connection part between the substrates is arranged in the resin-filled hollow part of the inner frame. The electronic pen described in the first item of the scope of patent application, wherein the aforementioned constituent member includes a pressure detecting part for detecting the pressure applied to the front end of the core body, and the aforementioned pressure detecting part is arranged In the vicinity of the second opening on the other side of the axial direction of the inner frame body and the front end side of the core body opposite to the front end side of the core body, and the pressure detecting part is detected based on the inner The entire frame is in front due to the pressure applied to the front end of the core. The electric quantity changed when the outer frame body is displaced toward the side opposite to the front end side of the core body to detect the pressure. The electronic pen described in the second item of the scope of patent application, wherein the pressure detecting part is provided with an elastic member which is combined with a member provided on the outer frame on the side opposite to the front end side of the core . The electronic pen described in the second item of the scope of patent application, wherein the pressure detection unit is provided with a device that detects the electrostatic capacitance by detecting the pressure received through the elastic member as the electrical quantity Semiconductor components. The electronic pen described in the second item of the scope of patent application, wherein the end surface of the inner frame body exposed on the side of the second opening on the side opposite to the front end of the core body and is provided on the outer frame body The member on the side opposite to the front end side of the core body is provided with an elastic member between the two. In response to the pressure applied to the front end of the core body, the entire inner frame body is The elastic member is interposed and displaced in the outer frame toward the side opposite to the front end side of the core. As for the electronic pen described in item 5 of the scope of the patent application, the pressure detection unit is one that detects the inductance as the electrical quantity, and has a coil wound on a magnetic core. On the side of the frame opposite to the front end side of the core, a magnetic body separated from the magnetic core of the pressure detecting portion in the inner frame is arranged with the elastic member interposed therebetween. For example, the electronic pen described in item 1 of the scope of patent application, wherein the aforementioned magnetic core does not have a through hole in the axial direction. The part of the magnetic core that is not wound with the coil is protruded from the first opening of the inner frame to form the core or a part of the core. The electronic pen described in the first item of the scope of patent application, wherein the circuit board is provided with a capacitor that is connected to the coil and constitutes a resonance circuit. As for the electronic pen described in claim 1, wherein the magnetic core is provided with a through hole for inserting the core, so that only a part of the core can pass from the first part of the inner frame. An opening part protrudes to the outside, so that the entire magnetic core is provided in the resin-filled hollow part of the inner frame. For the electronic pen described in item 1 or item 9 of the scope of the patent application, wherein the core body is made of a conductor, and a signal transmission circuit is formed on the circuit board so as to The signal from the signal transmitting circuit will be sent out through the aforementioned core to electrically connect the aforementioned core and the aforementioned signal transmitting circuit, and the electrical connection between the aforementioned core and the aforementioned signal transmitting circuit The part is provided in the resin-filled hollow part of the inner frame. The electronic pen described in the first item of the scope of patent application, wherein the outer frame is provided with a striking mechanism on the side opposite to the front end side of the core, and the inner frame is attached to The aforementioned axis direction The second opening on the other side is combined with the knocking mechanism. As for the electronic pen described in item 11 of the scope of patent application, in the outer frame, a plurality of the inner frames are individually installed in combination with the tapping mechanism for their own use. An electronic pen body part is an electronic pen body part housed in the hollow part of a cylindrical outer frame. It is characterized in that: inside the hollow part of the cylindrical electronic pen body part, it is housed to realize the inclusion The core is a functional component of the electronic pen, and a circuit board on which at least a part of the aforementioned component is arranged, and the front end of the core is one of the axial directions from the main body of the electronic pen With the first opening on the side protruding to the outside, the core system is housed in the electronic pen main body frame, and the hollow part of the electronic pen main body frame is filled with resin, the aforementioned structure The member includes a magnetic core, a coil wound on the magnetic core, at least the coil wound on the magnetic core, and an electrical connection part between the coil and the circuit board , Is provided in the resin-filled hollow portion of the inner frame. The electronic pen body described in the scope of patent application, in which the aforementioned constituent member includes a pressure detection unit for detecting the pressure applied to the front end of the core body, and the aforementioned pressure detection unit is Arranged in the body of the aforementioned electronic pen The front end side of the core body is opposite to the side of the front end of the core body and the vicinity of the second opening on the other side in the axial direction, and the pressure detecting section detects that the electronic pen body is based on All of them are detected by the electric quantity that changes when the outer frame is displaced toward the side opposite to the front end of the core in response to the pressure applied to the front end of the core, and the pressure is detected. An electronic pen body part is an electronic pen body part housed in a hollow part of a cylindrical outer frame, and is characterized by: a constituent member for realizing the function of an electronic pen including a core body, and is configured with the aforementioned At least a part of the circuit board of the constituent member is covered with resin except for the exposed front end side of the core body, and the constituent member includes a method for detecting that the core body is applied to the core body. The pressure detecting section for the pressure at the front end, the pressure detecting section is arranged on the opposite side of the axial direction from the front end side of the core body, and the pressure detecting section is provided by Detected electrical properties that have changed based on the fact that the entire body of the electronic pen is displaced in the outer frame toward the side opposite to the front end of the core in response to the pressure applied to the front end of the core. To detect the pressure, the constituent member includes a magnetic core and a coil wound on the magnetic core, at least the coil wound on the magnetic core, and the coil and The electrical connection part between the aforementioned circuit boards is set in the aforementioned The aforementioned inner frame body is filled with resin in the hollow portion. A method for manufacturing an electronic pen body, which is characterized in that the electronic pen body is an electronic pen body that is housed in a hollow part of a cylindrical outer frame, and is used to realize the function of an electronic pen containing a core body The constituent members and the circuit board on which at least a part of the aforementioned constituent members are arranged are covered by resin except for the exposed front end side of the aforementioned core body, and the aforementioned constituent members include The pressure detecting part that detects the pressure applied to the front end of the core, the pressure detecting part is arranged on the other side of the axial direction opposite to the front end of the core, The pressure detection unit detects that the entire body of the electronic pen is oriented toward the side opposite to the front end of the core in the outer frame in response to the pressure applied to the front end of the core. The electric quantity changed by the displacement is detected to detect the aforementioned pressure. The manufacturing method of the main body of the electronic pen is equipped with: the first process is the size of the cylindrical body contained in the hollow part of the outer frame. In the hollow part of the mold member for molding, the structural member for realizing the function of the electronic pen including the core body and the circuit board are housed except for the exposed front end side of the core body; and The second step is to fill the hollow portion of the mold member for molding with resin after the first step; and the third step is to remove the mold member for molding after the second step.

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